On the Edict of Lord Nguyễn Phúc Khoát allowing circulation of Western silver coins

Nguyễn Anh Huy, Vietnam Numismatics #1 (10-2017), p36-37

During the research of the currencies circulating in Vietnam, I have heard and read numerous documents stating that Lord Nguyễn Phúc Khoát (1738-1765), the ruler of Đàng Trong (Vietnam), issued an edict allowing the circulation of Western piastres. However, these documents only mention this indirectly without providing any specific quotations. After more than 30 years of research, it was not until July 2017 that I had the opportunity to access this document.